Compilare: user.cpp: In function ‘bool cauta(int)’: user.cpp:9:9: warning: unused variable ‘x’ [-Wunused-variable] int x; ^ user.cpp: In function ‘int main()’: user.cpp:30:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&t); ^ user.cpp:33:41: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&m,&n,&e); ^ user.cpp:35:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&a,&b); ^